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Question

The parallel rays of light after passing through a convex lens converge at:

A
Principal focus
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B
Optical centre
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C
Infinity
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D
Centre of curvature
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Solution

The correct option is A Principal focus
When parallel rays of light pass through the convex lens, they converge at a point called the principal focus. The principal focus is located at a distance equal to half the radius of curvature from the optical centre.

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